difference between lead and leading

.The folowing examples will tell you the difference betwen LEAD and LEADING when used as noun

Lead = - (v) This door leads to the backyard...: 這門通往後園.

- (Noun) Keep your dog on the lead in public places.
在公共場所你得用皮帶牽著狗。

Leading = (noun) Hong Kong is one of the leading financial centres in the world...: 香港金鎘中心在世界上有領導地位